1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56da32d0270de60750c14a945f6029851f7bdabe1dc0ae88dcd42c1ade1fe084. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/068b24ad-db1f-4978-9a98-3e380a01e6d0.json and https://artists.proofprofile.net/proofs/artist/068b24ad-db1f-4978-9a98-3e380a01e6d0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4306727b55b66264366d2607e231497c68d7f2b6163b3552720e0ccc6febbd3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPSR09314710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ee296bdbe07867176a1483a6476682b9029a46528642baba1257cd8c28f6b0. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPSR09222970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e62b61214fcc0790ffad87348908f1c3e8877314ebe76929060fc6457e0dff7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPSR09401652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06631f6e10f13301555d0465432e214ba95ee77a991dcd09763fe2f10ba7a0d. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPSR09402224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae586cc3fca60326719c2f32f1097b14bd50ba6c8292c8fcdd39a43cce70e4ef. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPSR09601676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e24f7a08a8145e0ca11a6187160a0bb73a311b8169dc32f44446b62f565055. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPSR09810381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33443e8af61ffd0420057ea834047147f0060fd9e544383d67be26bd51364ee8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPTE01303290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142a046eccd8263854c05a22597961de10739e839a0322351bb65ec0ce18f10a. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPTE01303300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf0d6e8931792cb0bb0fbbe0d5675b6dec309b5dadd9e1b8327d21bae938c2c. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPTE01903560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e99da284955986a8cbdb4fd3b64da127ef328c6fb75840458b9787d2220b9e. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPTE02003360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674e5e404e92acfb2d0fb92afd6ca5b6be7b743192e33950399fed7e62ec9285. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPTE00403580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80bc3286e5aebcbb08a3ed5d818d35064f1cfb35133960a71cc4ec56f482cca. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPTE01400560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af3286535b1d4423b4213a9b3d6806e5875a4afb07a9ff82c0d763e60729997. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPTE01801850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79daf08e257d8f064d4b2aa54511bb56bb56b840ccda9078503af2148e099f28. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPTE02202340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb03ae67f2e5fb901a39b1d6eba47f3c9a03ca0b37c43aae824b7fad15166b8. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPTE02401770.